E6
Midea Indoor-Outdoor Communication Error (Alternate Code) / Zero-Crossing or Feedback Error

Indoor unit shows E6 and stops; sometimes occurs during mode change or startup

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Damaged communication cable, Incorrect terminal wiring between indoor and outdoor units, Faulty indoor main PCB communication circuit, Faulty outdoor main PCB communication circuit

How to Fix / Troubleshooting

Safety first: Turn off power at the breaker before opening any covers.

Steps to check:

  • 1. Power cycle: Turn OFF the breaker for 5–10 minutes, then turn it back ON. Try operating the unit again.
  • 2. Verify interconnecting cable: Open both indoor and outdoor terminal covers. Confirm that the same wire colors are connected to the same terminal numbers/letters on both units. Correct any mismatches.
  • 3. Tighten terminals: Check that all terminal screws are tight and that no copper conductor is exposed outside the terminal block.
  • 4. Inspect cable route: Look for physical damage along the cable path (rodent bites, crushed sections, UV damage). Replace the cable if damaged.

When to call a technician: If wiring is correct and intact, the communication circuits on the indoor or outdoor PCB may be defective. A technician can test signal waveforms and replace the faulty board.

Advertisements

Repair Difficulty

Hard 4/5

Required Part

Interconnecting Communication Cable
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements